Environmental Systems Research

Table 8 Correlation matrix of heavy metals in surface water of nworie micro watershed

From: Environmental pollution loads on surface water chemistry and potentially ecological risks of inland aquatic ecosystem in South-Eastern State, Nigeria

Element	Cd²⁺	Cr²⁺	Cu²⁺	Fe²⁺	Ni²⁺	Pb²⁺	Zn²⁺
Cd²⁺	1.000
Cr²⁺	− 0.309	1.000
Cu²⁺	− 0.515^a	0.013	1.000
Fe²⁺	0.816^b	− 0.162	− 0.856^b	1.000
Ni²⁺	0.381	0.302	− 0.918**	0.700^b	1.000
Pb²⁺	0.603^b	0.005	0.185	0.319	− 0.239	1.000
Zn²⁺	0.681^b	− 0.236	−0.916^b	0.940^b	0.712^b	0.062	1.000

^aSignificant correlation at 0.05 p level
^bSignificant correlation at 0.01 plevel

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